The full comment quoted:

  >I like the idea, I just don't know how to implement a robust micropayment system that does not require a lot of messages back and forth for a transaction. Given the intended use-case, that would not work.

My reply is: here is the system that will work. Very simple. Keep in mind that multiple use cases and applications were mentioned, so I don’t see an issue for such an economic model to support at least some of the use cases.